There are two new posts: an initialization utility and example programs for a simple send/receive.
The utility can be used to initialize XBee radios using the NXTBee adapter. It should initialize everything, set pins, check and set baud rate, and save it all. When run, it will set the NXTBee up and write parameters to file. The second set sends messages that change between two NXT's. It's a pretty simple example but gets one started on working with this in NXC.It's all right here: http://www.dexterindustries.com/download.html#NXTBee